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APS - Amazing Prime Sequence |
Bablu is very fond of Series and Sequences...
After studying Fibonacci Series in Class IX, he was impressed and he designed his own sequence as follows...
a[0] = a[1] = 0
For n > 1, a[n] = a[n - 1] + f(n), where f(n) is smallest prime factor of n.
He is also very fond of programming and thus made a small program to find a[n], but since he is in Class IX, he is not very good at programming. So, he asks you for help. Your task is to find a[n] for the above sequence....
Input
Your code will be checked for multiple Test Cases.
First Line of Input contains T (<= 100), the number of Test Cases.
Next T lines contain a single number N. (1 < N < 10^7).
Output
Single line containing a[n] i.e. nth number of the sequence for each test case.
Example
Input: 3 2 3 4 Output: 2 5 7
Added by: | c[R]@zY f[R]0G |
Date: | 2013-02-14 |
Time limit: | 1s |
Source limit: | 5000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ASM64 |
hide comments
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2013-02-15 12:58:30 abdelkarim
@chicku did you try to solve it ?! |
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2013-02-15 11:33:23 chicku
what it is doing in classical problem. just move it to tutorial man!!! |
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2013-02-15 11:33:23 Ankit Paharia
very nice problem ... !!! |
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2013-02-15 11:33:23 :D
Alex, what do you mean by bad input? Do you think there are some errors or is it simply not using extreme values for N? |
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2013-02-15 11:33:23 (Tjandra Satria Gunawan)(曾毅昆)
first place :-D But I feel my algo still not the optimal one EDIT: Now, I don't need long long integer anymore to solve this problem ;-) T=100 is small... @Problem Seter: Nice problem ;-) I like it, could you change the cluster to pyramid? I think pyramid cluster is better for speed comparsion.. Last edit: 2013-02-15 07:08:42 |
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2013-02-15 11:33:23 abdelkarim
nice one . Last edit: 2013-02-15 05:07:56 |
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2013-02-15 11:33:23 Ehor Nechiporenko
APS: Amazing problem seriously! Last edit: 2013-02-14 20:44:59 |